Table 1.
Effect of metal ions on lytic activity of EDTA-treated LysB4
| Relative lytic activity (%) | ||
|---|---|---|
| Untreated | 100 | |
| 5 mM EDTA | 8.5 ± 0.2 | |
| Metal ions | 0.1 mM | 1.0 mM |
| Zn2+ | 104 ± 2.8 | Not available |
| Mn2+ | 89.5 ± 17.6 | 96 ± 8.4 |
| Ca2+ | 34.5 ± 12.0 | 90 ± 11.3 |
| Mg2+ | 32 ± 9.8 | 90.2 ± 9.6 |
| Hg2+ | 8.3 ± 2.5 | Not available |
| Cu2+ | 17.2 ± 5.9 | 12.5 ± 0.7 |
Relative lytic activities were measured by comparing the lytic activity of tests with it of LysB4 that was not treated with EDTA initially (Untreated). Values represent the mean ± standard deviation (n = 3).